233/239 112 lsa?
Thread Starter
Staging Lane
Joined: Jan 2015
Posts: 81
Likes: 0
From: Portland, TX
233/239 112 lsa? thinking of going with this cam, cant find anything on search, want to know how the power range is and sound with the 112 lsa ? ive got 02 m6 camaro ss with long tubes no cats and msd coils, wanted to stay with the stock 241 heads , plannig on 410's soon, thinking about asking pat g to do the tuning?
any input is appreciated!
any input is appreciated!
thinking about asking pat g to do the tuning?
Also, given that it's an off the shelf TSP cam have you thought about asking the very people that designed this cam, aka TSP themselves? They might know a thing or two about it...
Just my 2 cents.
What are your goals?
How do you want it to drive?
There's essentially two things to look at with any cam in a 346. One is the valve events and the other is the overlap. Overlap makes power but it also makes it harder to drive as you ratchet up the overlap. When you combine the valve events (opening and closing of the int/exh valves) and overlap together you end up with the shape of the torque curve and the intensity of the curve. It's what the sticky at the top talks about with why LSA doesn't matter. Pick your valve events and then pick how you want it to drive to determine the duration and LSA numbers. The valve events are pretty well set for the 346 with the plastic intakes. So the rest is tuning it for how you want it to drive and, ultimately, how much compression you wish to use.
For example, a 228/232 112+2 and a 234/238 110+3 will peak about the same RPM with the 234 making more peak power in a more violent fashion. It will drive worse and have less linear power delivery. But it will make a good 15-20hp more. Both like about the same amount of compression due to the same intake valve closing event. But the driving dynamics are significantly different as are the shapes of the curve due to the tighter LSA on the 234/238.
How do you want it to drive?
There's essentially two things to look at with any cam in a 346. One is the valve events and the other is the overlap. Overlap makes power but it also makes it harder to drive as you ratchet up the overlap. When you combine the valve events (opening and closing of the int/exh valves) and overlap together you end up with the shape of the torque curve and the intensity of the curve. It's what the sticky at the top talks about with why LSA doesn't matter. Pick your valve events and then pick how you want it to drive to determine the duration and LSA numbers. The valve events are pretty well set for the 346 with the plastic intakes. So the rest is tuning it for how you want it to drive and, ultimately, how much compression you wish to use.
For example, a 228/232 112+2 and a 234/238 110+3 will peak about the same RPM with the 234 making more peak power in a more violent fashion. It will drive worse and have less linear power delivery. But it will make a good 15-20hp more. Both like about the same amount of compression due to the same intake valve closing event. But the driving dynamics are significantly different as are the shapes of the curve due to the tighter LSA on the 234/238.
Thread Starter
Staging Lane
Joined: Jan 2015
Posts: 81
Likes: 0
From: Portland, TX
Thanx guys , talked to tsp and they got me setup..but I'm still wondering about rod bolts..?? Any input? I'd hate to pull the motor just to do rod bolts and cam.. I heard if I do go ahead and do rod bolts get th katech ones and not the arp..why is that??
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I run this cam. This is my cam only 02 z28.The only other upgrades to the engine have been the Prc springs and TPS push rods. The car gets raced every weekend and has over 250 passes and everything has been fine. The car has been 11.502 so I am pretty happy with the cam This is real world results not some dyno number. Runs fine ,drives fine and sounds good too.
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Tsp also specs cams as well. Before they release their cams they did a ton of engine dyno & track testing so they've got a pretty good handle on this stuff. I remember them posting results back in the day on their 228r cam & everyone thought that cam was going to her too huge & not even clear. Then we were all blown away by the results. Just call them directly for info on the cam & see what they say & see if a different cam would be better or even a custom one.
I wouldn't bother with rod bolts unless you decide to spin the thing over 7000 rpm and even then you are probably still ok.
I run the TSP 233/239 112 with livernois motorsports LS6 heads. This cam is about the biggest cam i would run in a daily driver. Just make sure you got a tuner.
Drives smooth, and has a nasty lope..
Drives smooth, and has a nasty lope..
What he said^. I love the cam, works great with my 3600 stall. You will be fine as far as the bottom end of the motor, but a good tuner will be needed to get the idle just right.
thinking of going with this cam, cant find anything on search, want to know how the power range is and sound with the 112 lsa ? ive got 02 m6 camaro ss with long tubes no cats and msd coils, wanted to stay with the stock 241 heads , plannig on 410's soon, thinking about asking pat g to do the tuning?
any input is appreciated!
any input is appreciated!
1st clip 3/4" plate
2nd clip no plate, sounds a lot cleaner and you can hear the lope better, but loud at wot.
It's an old cam, using I think XE high lift lobes, which are fine. They are easier on the valve train and work well.
One thing I don't like is the 112+0... it needs about 3 to 4 degrees advance to make it perform "optimally." A 233 duration intake lobe on a 112 ICL is too late for a 346 unless you have a lot of compression. You lose some bottom end with it but it should extend the power past peak pretty nicely.
One thing I don't like is the 112+0... it needs about 3 to 4 degrees advance to make it perform "optimally." A 233 duration intake lobe on a 112 ICL is too late for a 346 unless you have a lot of compression. You lose some bottom end with it but it should extend the power past peak pretty nicely.
Maybe it's because my car is stalled idk, but I wouldn't say I'm missing any bottom end and I only have 2.73's with stock 241 heads. I've had no problems at all with any car of similar mods/horsepower from a dig or slow roll.
I ran that cam in my 04 GTO. Pulled like a **** up top. My car did lose a significant amount of bottom end how ever. Being a heavier car with the stock 3.46 gears didnt help for sure. Big cam, LTW flywheel, heavy, and stock gears sucked dick from a dig.
OP like he said, if your car is a m6 then you need different gears to go with it and you'll be fine. Otherwise you'll be having to reel them in once you get your rpm's up. If your car is an automatic then just get at least a 3600 or higher stall and you'll be fine.
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Joined: Sep 2003
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thinking of going with this cam, cant find anything on search, want to know how the power range is and sound with the 112 lsa ? ive got 02 m6 camaro ss with long tubes no cats and msd coils, wanted to stay with the stock 241 heads , plannig on 410's soon, thinking about asking pat g to do the tuning?
any input is appreciated!
any input is appreciated!
As far as tuning, get someone that tunes fast cars at the track in your area.